America needs investment in its infrastructure. We need someone to invest hundreds of billions of dollars into for-profit trains, roads, airports, clean electricity generation, high-voltage transmission lines and more. As former Treasury secretary Larry Summers has noted, the nation’s commercial and residential housing stock probably does not need to be increased, but it could be improved in quality by replacing windows, insulation and monitoring systems, which save more in energy spending over time than would be spent on the renovations. Ideally, all the infrastructure projects should generate at least a modest profit, to ensure that the investments are productive.

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